<template>
	<div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="button-list">
					<div class="button-wrapper">
						<div class="button">{{this.$store.state.city}}</div>
					</div>

				</div>
			</div>
			<!-- 热门城市 -->
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="button-list">
					<div class="button-wrapper" v-for="item of hot" :key="item.id" @click="hangleCityClick(item.name)" >
						<div class="button">{{item.name}}</div>
					</div>
				</div>
			</div>
			<!-- 所有城市 -->
			<div class="area" v-for="(item,key) of cities" :key="key" :ref="key" >
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list">
					<div class="item border-bottom" v-for="innerItem of item" :key="innerItem.id" @click="hangleCityClick(innerItem.name)" >{{innerItem.name}}</div>
				</div>
			</div>
		</div>
	</div>
</template>

<script type="text/javascript">
	import BScroll from 'better-scroll'
	export default {
		name: 'CityList',
		props: {
			cities: Object,
			hot: Array,
			letter: String,
		},
		watch: {
			letter () {
				if(this.letter) {
					const element = this.$refs[this.letter][0];
					this.scroll.scrollToElement(element);
				}
			}
		},
		methods: {
			hangleCityClick(city){
				// this.$store.dispatch('changeCity', city)  //方法一
				//可以直接commit到Mutation进行对store下的state数据状态的更改
				this.$store.commit('changeCity',city)
				this.$router.push('/')
			}
		},
		mounted() {
			this.scroll = new BScroll(this.$refs.wrapper);
		},
	};
</script>

<style lang="stylus" scoped>
	@import '~styles/varibles.styl'
	.border-topbottom
		&:before
			border-color: #ccc
		&:after
			border-color: #ccc
	.border-bottom
		&:before
			border-color: #ccc
	.list
		position: absolute
		top: 1.58rem
		left: 0
		right: 0
		bottom: 0
		overflow: hidden
	.title
		line-height: .54rem
		background: #eee
		padding-left: .2rem
		color: #666
		font-size: .26rem
	.button-list
		padding: .1rem .6rem .1rem .1rem
		box-sizing: border-box 
		overflow: hidden
		.button-wrapper
			width: 33.3% 
			float: left
			.button
				border: .02rem solid #ccc
				margin: .1rem
				text-align: center
				padding: .1rem 0
				border-radius: .06rem
	.item-list
		.item
			line-height: .76rem
			padding-left: .2rem
</style>